HEИндивидуална стипендия2023–2026

MIS-5e · Unraveling AMOC-CO2 feedbacks during the warmer-than-present Last Interglacial

„Хоризонт Европа“ — Действия „Мария Склодовска-Кюри“

Период: 2023-09-01 → 2026-08-31
Финансиране от ЕС: 289 408 €
Участници: 2
Схема: HORIZON-TMA-MSCA-PF-GF

Линиите свързват координатора с партньорите.

Накратко на български

Връзката между океанските течения в Северния Атлантик и въглеродния цикъл се анализира чрез геохимични данни от древни корали и седименти. Това помага за по-доброто разбиране на климатичните процеси при температури, по-високи от сегашните, за бъдещи прогнози.

Този кратък обзор е генериран от изкуствен интелект

Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.

Резултати накратко

Unraveling AMOC-CO2 feedbacks during the warmer-than-present Last Interglacial

The MIS-5e project investigates climate instability in the North Atlantic during the last interglacial period (129,000 to 115,000 years ago), which is widely regarded as one of the most relevant analogues for the projected global climate at the end of this century. The project seeks to understand the feedback mechanisms between ocean circulation variability, particularly the Atlantic Meridional Overturning Circulation (AMOC), and carbon cycling during this time. The project focuses on paleoceanographic and paleoclimate reconstructions based on high-resolution geochemical data. In collaboration with scientists from GEOMAR and WHOI, I am analyzing multiple sediment cores and fossil corals from the North Atlantic using a suite of geochemical proxies to reconstruct past ocean and climate conditions. Isotopic data (δ¹³C, εNd, δ¹¹B) are used to assess changes in water mass chemistry and circulation patterns, while elemental ratios (Cd/Ca, B/Ca) provide insights into past nutrient levels and carbonate ion concentrations. The overarching goal is to fully leverage the last interglacial period as a natural experiment for understanding ocean-climate feedbacks under warmer-than-present conditions, offering valuable context for future climate projections.

Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз

Цел на проекта

The world ocean currently absorbs about 30% of anthropogenic carbon dioxide (CO2) emissions and is therefore an important source of solutions to fight the climate crisis. However, the development of ocean-based mitigation strategies requires improved representation of climate processes in Earth system models. In particular, modelling the effects of Atlantic Meridional Overturning Circulation (AMOC) weakening on the ocean’s ability to absorb CO2 remains a challenge, primarily due to a lack of understanding of climate feedback mechanisms. This project draws on high-resolution paleo-archives from the North Atlantic and a novel combination of geochemical tracers to determine how the AMOC varied during the Last Interglacial period, 129 to 115 thousand years ago, which is considered the best historic analog of the global climate state projected for the end of this century. The project will not only provide crucial constraints on magnitude of natural AMOC variability, but will allow, for the first time, a systematic investigation of AMOC-CO2 feedbacks in a warm climate, helping quantify the mechanisms that influence the ocean’s effectiveness in sequestering CO2 from the atmosphere. The results will move us forward in unraveling the ocean-climate nexus and help reduce uncertainties in climate projections, which will benefit the Intergovernmental Panel on Climate Change (IPCC). The multi-faceted public engagement activities will maximize the project's contribution to the climate emergency and daily climate action, contributing to the EU Adaptation Strategy, the EU Green Deal and the UN Sustainable Development Goals.

Оригинален текст от CORDIS (на английски).

Участници

HELMHOLTZ-ZENTRUM FUR OZEANFORSCHUNG KIEL (GEOMAR) · KielКоординаторГермания
WOODS HOLE OCEANOGRAPHIC INSTITUTION · Woods HoleСъединени щати